德克萨斯农工大学交通研究所的研究工程师凯文·鲍克说，虽然智能交通灯对一些城市特别有帮助，但有些城市太拥挤了，只有大幅减少道路上的汽车数量才能有效改变拥堵的局面。

Kevin Balke, a research engineer at the Texas A&M University Transportation Institute, says that while smart lights can be particularly beneficial for some cities, others are so jammed that only a sharp reduction in the number of cars on the road will make a meaningful difference.

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史蒂文：她太累了。她们作太努力了，玛丽亚。

Steven: She's exhausted. She was working too hard, Maria.

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杰夫：对不起，我迟到了，史蒂文。交通太拥挤了。

JEFF: Sorry I'm late, Steven. There was a lot of traffic.

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